Traverse the network hierarchy

These functions step up and down the network hierarchy. supernet() returns the supernetwork containing the given network. subnets() returns the list of subnetworks which join to make the given network.

Usage

supernet(x, new_prefix = prefix_length(x) - 1L)

subnets(x, new_prefix = prefix_length(x) + 1L)

Arguments

x

An ip_network vector

new_prefix

An integer vector indicating the desired prefix length. By default, this steps a single level through the hierarchy.

Value

• supernet(): An ip_network vector

• subnets(): A list of ip_network vectors

Details

The ipaddress package does not support long vectors (i.e. vectors with more than 2^31 - 1 elements). The limits the number of subnetworks that subnets() can return. However, you might find that machine memory imposes stricter limitations.

See also

Use seq.ip_network() to list the addresses within a network.

Use is_supernet() and is_subnet() to check if one network is contained within another.

Examples

supernet(ip_network("192.168.0.0/24"))
#> <ip_network[1]>
#> [1] 192.168.0.0/23

supernet(ip_network("192.168.0.0/24"), new_prefix = 10L)
#> <ip_network[1]>
#> [1] 192.128.0.0/10

subnets(ip_network("192.168.0.0/24"))
#> <list_of<ip_network>[1]>
#> [[1]]
#> <ip_network[2]>
#> [1] 192.168.0.0/25   192.168.0.128/25
#> 

subnets(ip_network("192.168.0.0/24"), new_prefix = 27L)
#> <list_of<ip_network>[1]>
#> [[1]]
#> <ip_network[8]>
#> [1] 192.168.0.0/27   192.168.0.32/27  192.168.0.64/27  192.168.0.96/27 
#> [5] 192.168.0.128/27 192.168.0.160/27 192.168.0.192/27 192.168.0.224/27
#>